|Publication number||US7227510 B2|
|Application number||US 09/880,516|
|Publication date||Jun 5, 2007|
|Filing date||Jun 12, 2001|
|Priority date||Jun 14, 2000|
|Also published as||CA2412319A1, CA2412319C, EP1300009A1, EP1300009A4, US20020008675, WO2001097514A1|
|Publication number||09880516, 880516, US 7227510 B2, US 7227510B2, US-B2-7227510, US7227510 B2, US7227510B2|
|Inventors||Theodore Mayer, III, Peter J. Inova, Todd A. Chaney, Lawrence S. Paul|
|Original Assignee||Panoram Technologies, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (42), Non-Patent Citations (3), Referenced by (16), Classifications (24), Legal Events (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present application claims the priority of U.S. Provisional Application No. 60/211,814 entitled “Method and Apparatus for Seamless Integration of Images Using a Transmissive/Reflective Mirror” filed Jun. 14, 2000, the contents of which are fully incorporated by reference herein. Further, the present application contains subject matter related to the subject matter disclosed in U.S. patent application Ser. No. 09/591,555 entitled “Multi-Panel Video Display” filed Jun. 8, 2000, the contents of which are fully incorporated by reference herein.
The present invention is related to display of a composite image using multiple image sources, and particularly to method and apparatus for seamless integration of images using a transmissive/reflective mirror.
Computer users often desire to view video or graphic images that exceed the viewable area of a single monitor. For example, designers of large systems often use computer aided design (CAD) tools to generate designs. Many times, these designs are too detailed or too large to fully display on a single monitor with the desired high enough resolution. In addition, users often display multiple computer windows simultaneously. The multiple windows typically overlay and block one another since the viewable area of a monitor is generally not large enough to accommodate more than a few computer windows at the same time.
A typical home computer user may become frustrated by the crowding of the desktop screen by multiple computer windows. A professional computer user, e.g., a graphic artist or a CAD designer, in addition, may suffer from inefficiency or low productivity associated with being able to view only a portion of a large image or having to stack and re-stack multiple computer windows.
From an entertainment standpoint, the industry has always sought bigger, brighter, higher quality, more involving display technologies with continuous improvements, for example, from black and white to color, from color television to HDTV, and from 35 mm film to Imax.
A larger viewable area, i.e., larger screen real estate, and higher resolution, i.e., more pixels, is thus always desirable and very useful, whether for laying out and viewing a larger portion of video or graphic images at the same time or simply for more involvement in the content. Therefore, it is often desirable to display video or graphic images on a viewable area that is bigger than what is typically available on a single monitor. Arrayed display systems have been used to create a viewable area that is taller and/or wider than what is normally available on a single monitor. A typical arrayed display system includes two or more video display devices that are horizontally and/or vertically adjacent to one another.
An important character is the adjacency or the apparent seamlessness of the transition between image segments. If the adjacent segments are too far apart, the users tend to segregate their use of the system by screen segments, thus dramatically reducing the potential usefulness of the larger work surface. Thus, a highly desirable quality of an arrayed display system is the minimization of apparent segregation between the array segments.
One method of diminishing this segregation is embodied in multi-projector based display systems. These systems typically include two or more video projectors that are arrayed in an overlapping adjacent format with each projector being fed by one channel of a visual computer or other video source. The result generally includes a composite image that combines the additive size, the additive brightness and the additive resolution of the multiple channel sources and the multiple projectors.
An example of this projection technology is described in U.S. Pat. No. 4,974,073 entitled “Seamless Video Display,” U.S. Pat. No. 5,136,390 entitled “Adjustable Multiple Image Display Smoothing Method and Apparatus,” and U.S. Pat. No. 6,115,022 entitled “Method and Apparatus for Adjusting Multiple Projected Raster Images,” the contents of all of which are fully incorporated by reference herein.
The use of projector-based display systems may provide a larger viewable area and higher resolution than a single monitor or a display device. However, projector-based display systems are not always suited for widespread use by individuals since the current systems can be expensive, large and technically complex.
Multiple conventional computer monitors or flat panel displays may be placed side by side to provide a type of arrayed display system. However, due to the packaging of most standard CRTs and other monitors, such a configuration typically results in wider than acceptable image segregation, also referred to as a mullion, between the displays. This prevents the displays from having an integrated look as illustrated in
Therefore, there is a need for an arrayed display system that is capable of providing reduced separation between portions of a composite image in adjacent displays as to reduce viewer distraction. The arrayed display system preferably is affordable to a wider range of users and designed to address ergonomic considerations for providing viewer comfort.
In one embodiment according to the present invention, an integrated display system is provided. The integrated display system comprises a first display, a second display and a transmissive/reflective mirror. The first display has a display area that faces a user. The second display has the display area that faces a generally vertical direction. The transmissive/reflective mirror has a mirror face between the first display and the user. Images from the first display at least partially pass through the mirror face towards the user, and images from the second display are at least partially reflected by the mirror face towards the user, so as to present a composite image comprising the images from the displays to the user.
In another embodiment according to the present invention, is a method of generating a composite image using a transmissive/reflective mirror. A first image is projected towards a user through the transmissive/reflective mirror. A second image is applied at the transmissive/reflective mirror for the second image to be reflected towards the user. The first image and the second image are slightly overlapped and can be soft edge blended like projected images so that the images appear as a seamless composite image to the user.
In yet another embodiment according to the present invention, is a method of generating a composite image using a transmissive/reflective mirror while applying imaging devices small enough to be carried or worn by the user where a first image is seen directly by the user through the mirror and the second image is seen by the user as a reflected image as described in FIG. 7. The first image and the second image appear as a composite image to the user.
In still another embodiment according to the present invention, is a method of generating a composite image using a transmissive/reflective mirror while applying imaging devices small enough to be carried or worn by the user where a first image is seen directly by the user through the mirror and the second image is seen by the user as a reflected image as described in FIG. 7. The first image and the second image are slightly overlapped and can be soft edge blended like projected images so that the images appear as a seamless composite image to the user.
The monitor 500 preferably is oriented to have its display area 501 substantially normal to ground and facing a user (a viewer). In other embodiments, the monitor 500 may have its display area 501 tilted forward towards the user or backward away from the user.
The monitors 502 and 504 have display areas 503 and 505, respectively. The display areas 503 and 505 preferably face a generally upward direction. In the described embodiment, the monitors 502 and 504 are oriented such that the display areas 503 and 505 are angled in a direction towards facing one another. The display areas 503 and 505 may have an angle of, for example, 20 degrees, with respect to one another.
In other embodiments, the angle between the display areas 503 and 505 and ground may be more or less than 20 degrees or even angling outward, or the display areas 503 and 505 may not be angled and may face a substantially straightly upward direction. For example, by angling the two edge monitors in a three monitor system, all three monitors may be seen as being equidistant to the viewer, which is desirable for ergonomic reasons similar to one embodiment of the invention disclosed in U.S. patent application Ser. No. 09/591,555 entitled “Multi-Panel Video Display,” the contents of which have been fully incorporated by reference herein. For another example, when more monitors (e.g., five monitors) are used, by arraying the monitors with angles, an illusion of a miniature curved screen may be presented to the viewer.
The transmissive/reflective mirror 506, which may also be referred to as a beam splitter, preferably includes a 50/50 transmissive/reflective mirror, which passes through approximately 50% of the incident light and reflects approximately 50% of the incident light.
In other embodiments, the ratio between the amount of transmitted light and the amount of reflected light may be more or less than 1. The transmissive/reflective mirror 506 preferably has a mirror face 507, which may also be referred to as a face of the mirror. The mirror face 507 preferably is at approximately 45 degree angle (angle A of
Since the transmissive/reflective mirror 506 is between the display area 501 and the user, the user typically views images on the display area 501 through the mirror face 507. At least a portion of light from the display area 501 typically does not pass through the mirror face 507, and thus brightness of the images from the display area 501 is generally reduced when viewed by the user through the mirror face 507. The ratio between the passed-through and non-passed-through portions of light depends on the transmissive/reflective characteristics of the mirror face used.
Since the display areas 503 and 505 face generally upward direction towards the mirror face 507, the user typically views reflections of the images from the display areas 503 and 505 formed on the mirror face 507. At least a portion of light from the display areas 503 and 505 typically passes through the mirror face 507, and thus brightness of the images from the display areas 503 and 505 are generally reduced when viewed by the user as reflections on the mirror face 507. The ratio between the passed-through and non-passed-through portions of light depends on the transmissive/reflective characteristics of the mirror face used.
The monitors 502 and 504 preferably are oriented so that the top of images on the display areas 503 and 505, respectively, are closer to a user than the bottom of the images on the display areas 503 and 505. Thus, when the images from the display areas 503 and 505 are reflected by the mirror face 507, the top of the images appears near the top of the mirror face 507 and the bottom of the images appears near the bottom of the mirror face 507. Similar to typical reflections, the images from the display areas 503 and 505 are generally horizontally reversed when reflected on the mirror face 507, and a left edge of each image typically appears as a right edge of a corresponding reflected image, and vice versa.
A light output 512 from the monitor 500 is applied to the face of the transmissive/reflective mirror 506. A light component 516 passes through the mirror to be viewed by the viewer while a light component 514 is reflected by the mirror 506 away from the viewer eye 510.
A light output 518 from the monitor 502 is applied to the face of the transmissive/reflective mirror 506. A light component 522 is reflected by the mirror to be viewed by the viewer while a light component 520 passes through the mirror 506 in a direction away from the viewer eye 510.
In an exemplary embodiment, the integrated display system may be placed inside a light controlled cabinet, and the transmissive/reflective mirror 506 preferably creates the appearance of a virtual image plane in which the images appear as a single composite image. The three images preferably appear to be edge matched to one another, creating a seamless (virtual) composite image. The images may appear to be at an angle with respect to one another. For example, when the angle between ground and each of display areas 503 and 505 is approximately 20 degrees, the images may appear to be at an angle of approximately 20 degrees with respect to one another.
The integrated display system may also be coupled to a control unit (not shown) for providing inputs and power to the monitors 500, 502, 504, and for controlling the displays on the monitors. The control unit may be used to control display characteristics of all three of the monitors. In other embodiments, a separate control unit may be used to control display for each monitor. The integrated display system may include a control software for display configuration and maintenance. The control software may be commanded to perform control functions from the control unit or any other external device such as an external computer. The control software may be controlled by using an input device such as a keyboard and/or mouse.
The signals feeding the integrated display system may also be passed through an external signal processing device (not shown) in order to modify each signal relative to the other to create a more uniform, geometrically correct and seamless image. The signal processing may include modification of the images (such as with distortion correction circuitry) in order to correct aberration due to mechanical and/or optical misalignment. This correction preferably performs geometric distortion correction to tune the flaws of the monitors in order to perfectly align the images either for overlap or for adjacency.
The signal processing may also include modification of the images in order to correct image non-uniformity which may include, but not limited to, hot spotting and/or color balancing such as, for example, disclosed in U.S. Pat. No. 6,115,022. Further, the signal processing may also include edge blending, such as, for example, disclosed in U.S. Pat. Nos. 4,974,073 and 5,136,390, in an embodiment where the images are overlapped.
In combination, the signal processing may be used to control display characteristics of all three of the monitors. In other embodiments, signal processing capabilities may be built into each monitor or into the multi-monitor system. The signal processing capabilities may be implemented using a control software for display configuration and adjustment of parameters. The control software may be commanded to perform control functions from the control unit or any other device such as an external computer. The control software may be controlled by using an input device such as a keyboard and/or mouse or an automated feedback system.
In an exemplary embodiment, the integrated display system may include a port (not shown), such as a universal serial bus (USB) port, an RS-232 port, or any other conventional or non-conventional serial or control port, for communication with an external device such as a computer. The port may be used to perform control functions. The port input and the control software preferably allows for external control of characteristics including but not limited to: screen input selection, automatic input calibration and three screen interactive color adjustments. A full setup configuration may be stored and be easily accessible and selectable, by, e.g., screen menu selection, a button selection or clicking a mouse button.
The monitors may include liquid crystal display (LCD) monitors or they may include any other commonly or not commonly used monitors such as, for example, plasma display monitors, or they can include new technologies such as E-ink, organic liquid crystals or organic transistors. The monitor input signals may be analog such as composite video or red, blue, green, sync, or the inputs may be digital such as Digital Visual Interface (DVI) or the inputs could be optical or other technologies not yet directly anticipated.
The integrated display system in an embodiment according to the present invention is capable of selecting from multiple inputs including but not limited to: a main and auxiliary RGB signals for each of the three monitors, composite video signals and/or S-video (Y/C). These inputs allow for use of other devices in addition to a main multi-channel visual computer. Other devices that may provide inputs to the integrated display system may include laptops, VCR, DVD, video conferencing equipment, cable television set top box, as well as closed circuit television and satellite feeds. The user may then be able to select the input feeds or preset combinations of feeds. The integrated display system may also include audio inputs and be coupled to speakers for audiovisual communications.
In one embodiment, the left, center and right images may be overlapped at the adjacent edges as to generate an overlapped region between the left image and the center image and between the center image and the right image. Edge blending technology may be applied to the overlapped images to enhance the seamless appearance of the composite image generated by the three images. Examples of this projection technology is described in U.S. Pat. Nos. 4,974,073, 5,136,390 and 6,115,022, all of which have been incorporated by reference herein.
A multi-channel visual computer 700 preferably includes three graphic interface cards 702, 704 and 706. The graphic interface cards 702, 704 and 706 preferably provides images 716, 718 and 720 to corresponding monitors 502, 500 and 504, respectively. The multi-channel visual computer 700 may be based on one or more of Unix, Mac-OS, Windows/NT, MS-DOS and Linux operating systems or any other conventional or non-conventional operating system.
The multi-channel visual computer 700 may provide graphics and/or video signals that represent the images 716, 718 and 720 to corresponding input for each of the three monitors 502, 500 and 504 including but not limited to: DVI, Firewire, or other direct digital formats, main and auxiliary RGB inputs, composite video inputs and S-video (Y/C) inputs among others.
In other embodiments, two or three separate computers may be used in place of the multi-channel visual computer 700 to provide graphics and/or video signals to the integrated display system. The images 716, 718 and 720 may be three unrelated images or each of the images may be a portion of a composite image. The graphic images 716, 718 and 720 may also be substantially identical to one another.
An additional image may be provided by a laptop 710 or any other computer or an electronic device capable of providing an image. The laptop 710 preferably provides an image 726 to the monitor 504 of the integrated display system. For example, the image 726 may include a picture of a vehicle and a tree.
Since the integrated display system in this embodiment is typically used to display three image segments, one on each array segment, when the laptop 710 provides the fourth image 726 in addition to the graphic images 716, 718 and 720 from the multi-channel visual computer 700, a switch 714 preferably is used to switch between one of the images from the multi-channel visual computer 700 and the image 726.
For example, the images 720 and 726 preferably are coupled to the switch 714. The switch 714 preferably multiplexes them to provide an image 728 to the monitor 504 of the integrated display system. The image 728 may be the image 720 or the image 726 based on the selection by the switch 714. The switch 714 may be manually controlled, e.g., through manipulation of a mechanical switch by the user. The switch 714 may also be electronic and controlled manually or controlled automatically, e.g., by a software running in the control unit (not shown). The switch 714 may also be used to provide the image 720 or the image 726 to one or both of the other two monitors 500 and 502 as indicated by dotted arrows on FIG. 12. In other embodiments, the switch 714 may also receive images from one or more other image sources to be selectively provided to one or more of the monitors 500, 502 and 504.
A video cassette recorder (VCR) 708 in one embodiment may provide a graphic image 722 to a switch 712, which preferably is similar to the switch 714. The image 716 from the multi-channel visual computer preferably is also coupled to the switch 712. The switch 712 preferably operates similarly to the switch 714 in that it selects between the images 716 and 722 to provide as an image 724 to the monitor 502 of the integrated display system. The switch 712 may also be used to provide the image 716 or the image 722 to one or both of the other two monitors 500 and 504 as indicated by dotted arrows on FIG. 12. In other embodiments, the switch 712 may also receive images from one or more other image sources to be selectively provided to one or more of the monitors 500, 502 and 504.
A switch 713, which preferably is similar to the switch 714, receives the image 718, and provides to the monitor 500 as an image 719. The switch 713 may also be used to provide the image 718 to one or both of the other two monitors 502 and 504 as indicated by dotted arrows on FIG. 12. In other embodiments, the switch 713 may be coupled to one or more other image sources to be selectively provided to one or more of the monitors 500, 502 and 504. In other embodiments, some of the image inputs may be provided to one or more monitors directly without going through a switch.
The matrix switcher 715 may receive images 716, 718 and 720 from the multi-channel visual computer 700, the image 722 from the VCR 708 and/or the image 726 from the laptop 710. The matrix switcher 715 is capable of providing any of these image inputs as an image 725 to the monitor 502, as an image 727 to the monitor 500 and/or as an image 729 to the monitor 504. The matrix switcher 715 may also provide the identical image to any two or three of the monitors 500, 502 and 504. In other embodiments, the switcher 715 may receive image inputs from different number of image sources and/or provide outputs to different number of monitors/display devices.
The image 804 b also is independent of the composite image. For example, the image 804 b may be that of a vehicle and a tree. The image 804 b, e.g., may be provided by the laptop 710 through the switch 714 shown in FIG. 12. In other embodiments, the image 802 b may also be independent of the composite image.
In one embodiment of the present invention, active matrix stereographics may be used with the integrated display system in order to create virtual reality (VR) and/or immersive visualization system by providing a realistic hologram type image (e.g., 3-D stereoscopic view) of the displayed objects on the composite image. For example, slightly different composite images are generated for the right and left eyes, respectively. The viewpoint preferably is slightly shifted right and left as it would be if an object is viewed first with one eye then another.
A synchronizing signal is sent to an infrared transmitter, which broadcasts an infrared synchronizing signal into the viewing area to be received by a pair of electronic shutter glasses with lenses including fast liquid crystal shutters. The synchronizing signal controls the glasses to alternately blank one eye then the other.
In other embodiments, the integrated display system may also include polarized glasses. polarization of light for the images transmitted through or reflected from the transmissive/reflective mirror is sequentially altered and resulting images are viewed by the user through the polarized glasses in order to see a 3-D stereoscopic view of objects displayed on the composite image.
Accordingly, the present invention provides an integrated display system for displaying a high-resolution composite image. Although this invention has been described in certain specific embodiments, many additional modifications and variations would be apparent to those skilled in the art. It is therefore to be understood that this invention may be practiced otherwise than as specifically described. Thus, the present embodiments of the invention should be considered in all respects as illustrative and not restrictive, the scope of the invention to be determined by the appended claims and their equivalents rather than the foregoing description.
For example, in another embodiment, an integrated display system may include two monitors (left and right monitors) with display areas substantially normal to ground and facing a user, and one monitor (center monitor) with display area facing a generally upward direction. In this embodiment, the user typically views images from the display areas of the left and right monitors through a mirror face of a transmissive/reflective mirror while viewing the reflection of the image from the display area of the center monitor on the mirror face.
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|U.S. Classification||345/1.1, 353/30, 348/744, 345/9, 348/E09.012, 348/E05.136|
|International Classification||H04N5/66, H04N9/31, G09F9/00, H04N5/74, H04N13/04, G03B21/26, H04N5/72, H04N9/12, G09G5/00, G06F3/14|
|Cooperative Classification||G06F3/1446, H04N9/12, H04N5/72, H04N5/74|
|European Classification||H04N5/74, G06F3/14C6, H04N9/12, H04N5/72|
|Sep 10, 2001||AS||Assignment|
Owner name: PANORAM TECHNOLOGIES, INC., CALIFORNIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MAYER, THEODORE, III;INOVA, PETER;CHANEY, TODD A.;AND OTHERS;REEL/FRAME:012150/0244
Effective date: 20010829
|Sep 19, 2002||AS||Assignment|
Owner name: PANORAM TECHNOLOGIES, INC., CALIFORNIA
Free format text: CORRECTIVE DOCUMENT OF ASSIGNMENT RECORDED AT 012150 FRAME 0244 ON 09/10/2001;ASSIGNORS:MAYER, THEODORE III;INOVA, PETER J.;CHANEY, TODD A.;AND OTHERS;REEL/FRAME:013328/0848
Effective date: 20010829
|Dec 4, 2007||CC||Certificate of correction|
|Jan 10, 2011||REMI||Maintenance fee reminder mailed|
|Jun 5, 2011||LAPS||Lapse for failure to pay maintenance fees|
|Jul 26, 2011||FP||Expired due to failure to pay maintenance fee|
Effective date: 20110605